DOAJ Open Access 2024

Kinetic ferromagnetism and topological magnons of the hole-doped Kitaev spin liquid

Hui-Ke Jin Wilhelm Kadow Michael Knap Johannes Knolle

Abstrak

Abstract We study the effect of hole doping on the Kitaev spin liquid (KSL) and find that for ferromagnetic (FM) Kitaev exchange K the system is very susceptible to the formation of a FM spin polarization. Through density matrix renormalization group simulations on finite systems, we uncover that the introduction of a single hole, corresponding to ≈1% hole doping for the system size we consider, with a hopping strength of just t ~ 0.28K is enough to disrupt fractionalization and polarize the spins in the [001] direction due to an order-by-disorder mechanism. Taking into account a material relevant FM anisotropic exchange Γ drives the polarization towards the [111] direction via a transition into a topological FM state with chiral magnon excitations. We develop a parton mean-field theory incorporating fermionic holons and bosonic magnons, which accounts for the doping induced FM phases and topological magnon excitations. We discuss experimental implications for Kitaev candidate materials.

Topik & Kata Kunci

Materials of engineering and construction. Mechanics of materials Atomic physics. Constitution and properties of matter

Penulis (4)

Hui-Ke Jin

Wilhelm Kadow

Michael Knap

Johannes Knolle

Format Sitasi

APA MLA BibTeX

Jin, H., Kadow, W., Knap, M., Knolle, J. (2024). Kinetic ferromagnetism and topological magnons of the hole-doped Kitaev spin liquid. https://doi.org/10.1038/s41535-024-00678-8

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Informasi Jurnal

Tahun Terbit: 2024
Sumber Database: DOAJ
DOI: 10.1038/s41535-024-00678-8
Akses: Open Access ✓